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If (a_n=30-3n), what will be the (6)th term?

Answer and explanation

Correct answer: 12

To find the sixth term, substitute \(n=6\) in the given general term: \(a_6=30-3(6)=30-18=12\). Hence, the correct answer is 12. The value 18 is only \(3\times6\); it must still be subtracted from 30. Exam tip: Always substitute the term number carefully for \(n\) in \(a_n\).

Related tags

Arithmetic ProgressionNth TermGeneral TermSubstitutionClass 10 MathematicsFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)

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